Jack for power-operated shovels.



G. T. KLEVEN. JAOK FOR POWER OPERATED SHOVELS.

APPLIGATXON I'ILBD NOV. 19, 1912.

1 067 038. Patented July 8, 1913.

2 SHEETS-SHEET 1.

gwmmtoz Wiimeqoeo G. T. KLEVEN.

JACK FOR POWER OPERATED SHOVELS.

. APPLICATION TILED NOV. 19,1912.

Patented July 8, 1913.

2 8EBBTB8HEET 2.

GEORGE T. KLEVEN, OF WINESAP, .WASHINGTON.

JACK FOR POWER-OPERATED SHOVELS.

Specification of Letters Patent.

Patented July 8, 1913.

Application filed November 19, 1912. Serial No. 732,258.

To all whhm 2'25 may concern Be it known that I, GEORGE T. KLuvhN, a citizen of the United States, residing at Winesap, in the county of Chelan and State of Washington, have invented new and useful Improvements in Jacks for Power-Operated Shovels, of which the following is a specification.

This invention relates to jacks for power operated shovels, the object in View being to provide a lifting jack which may be applied to the truck of the ordinary steam shovel at present in use, the said jack as a whole embodying a truck suspension frame, combined with one or more supporting arms and operative connections therefor controlled by the power plant of the shovel, whereby the supporting arms may be depressed and elevated.

A further object of the invention is to so arrange the supporting arms of the jack that they will provide a broad bearing and anchorage for the wheeled truck of the steam shovel and obviate any liability of the steam shovel to turn over, or for the wheels of the truck to roll upon thetrack rails upon which they rest.

With the above and other objects in view, the invention consists in the construction, combination and arrangement of parts, as will be hereinafter more fully described. illustrated in the accompanying drawings,

and pointed out in the claim hereunto appended.

In the drawings: Figi'ire 1 is a side clevat-ion of a sufiicient portion of a steam shovel to illustrate the application of the present invent-ion thereto. Fig. 2 is an end view of the same. Fig. 3 is a plan view of a portion of the truck, showingv the motor actuated means for operating the jack. Fig. 4. is a detail perspective View of the combinedbottom step and bracket. 1g. 5 is a similar view of the topstep. F 6 is'adetail view of one of the jack screws and the parts immediately associated therewith. Fig. 7 is a detail view of the thrust bar.

Referring to the drawings, 1 designates the truck frame of an ordinary motor or steam shovel, 2 designating the carrying wheels at one end thereof, the same being designed to run upon the parallel track rails 3. a

t designates the usual crane arm, by which the shovel is controlled.

In carrying out the present iiivention', I provide a truck suspension frame which is best illustrated in Fig. 2, wherein it is shown to.embrace the truck and extend upward above and across the same, said frame embodying the upwardly converging side bars 5, the top connecting bar (3, and the lower side portions 7 which lie on opposite sides of the truck, and have their lower ends bent inward, as shown at 8, and seoured to the truck by bolts 9 passing.

through eyes in the ends thereof.

Each of the side bars 5 is longitudinally slotted, as shown at 10 in Fig. 1, thereby forming parallel guides 11, between which a runner 12 moves. This runner 12 is threadcd to receive a jack screw 13, the upper end of which is jourualcd in a step 14- having an angle base 15 which is bolted in one of the upper corners of the truck suspension frame, as shown in Fig. 2. The step 14: comprises a detachable cap 16 to admit of the introduction and removal of the jack screw 13, the upper end o'f'which is left smooth to form a journal 17 which fits into the top step. The jack screw 13 is also provided with a smooth journal 18 at the lower end thereof, around which is placed a bearing sleeve or bushing 19 which is re-' ceived in a socket 20 in a combined bottom step and bracket 21 secured to one side of the truck frame. This combined bottom step and bracket is provided at the lower end thereof with an extension 22, to which is pivotally connected. at 23, a supporting arm 24. This arm is flanged at its outer end, as shown at 25, and has permanently sc cured thereto a shoe or rest 26 adapted tobear uponthe ground, as illustrated in Fig.

2, when depressed by the mechanism hereinafter referred to. Interposed between the runner 12 and theouter end of the supporting arm 24 is a thrust bar 27, the same being pivotally connected, at 28 and 29, to the parts referred to. It will now be seen that when the jack screw 13 is revolved on its longitudinal axis, the runner 12 will be fed lengthwise thereof, and a corresponding movement will be imparted to the thrust.

bar 27, thereby causing the latter to move the arm 24: around the pivot 23, for the purpose of elevating and depressing the shoe 26.

The bottom step 21 is provided with bearings 30, embodying removable caps 31, in which is journaled a worm shaft 32, the worm 33 of which engages and drives a screw 13.v The shaft. 32- iskmounted in the worm Wheel 34 fast-on 'the adjacent jack bearings 35 on the truck frame and is provided at one end with a-miter gear 36 which meshes with acorresponding gear 37 on an extension sh aft '38 at one end of. a ack operating shaft 39." vThe shaft 39 is geared by means of a pinion 40 to a larger gear wheel 41 on the hoisting drum 42 of the steam shovel, it being understood that the drum 42 is operated by the engine or motor car-' ried'by the shovel. This enables the mechanism of the jack to be operated by the motor of the shovel.

It will be understood that the supporting armL-and. jack screw arrangement herein? above. described is duplicated at opposite sides of-the truck, as clearly shown in Fig. 2, there being two extension shafts 38 for transmitting the power to the worm shafts 32 and thence. to the jack screws. 'Incon-;

nection with-each extension shaft 38 and jack operating shaft 39, a clutch 43a is pro-' vided, the same being operated by a bell-.

crank lever 44, from which a connecting- .rod 45, leads toa crank 46 on a rock shaft 47 provided with a pedal lever 48, bysdepressing which the clutch may be thrown into and out of operation. The mechanism just described provides for throwing either one of thejack screws into operation, or-

ifdesired, both of the job}; screws may be thrown into operation at the same time, the pedal levers48being" arranged within convenient reach of the Operator standing on; the platform of the steam shovel. It will] "further be'noted'.byreference to Figs. 1- and I 2 that the lower portions 7 p of; the side bars .of the trucksuspension frame are bifurcated, formin'g branches .-7 and just where said branches are bent at the points 8 to. extendtowardeach other. under the truck, the vb0ttom-step-21 is provided with oppositely projecting shoulders 49,beneat-h which said branches pass. This serves as an additional support and anchorage for the bottom step 21, upward movement of which is pre vented by a shoulder 5f) on the"step, which I extends under one of the longitudinaliside' bars of the truck frame, as shown in Fig. 2. Said step. may also be bolted. to the truck by means of bolts 51, and these bolts may "also pass through the branch 7, as indicated in Fig. 1.

In Fig. 2 of drawings, one of the supporting arms 24 is shown in its downward position with theshoe 26 resting up'on' the ground, while the other supporting arm I isgshown elevated, this beingdone to better illustrate the relative position of the two partsiunder each arrangement. It will be understood that one 'or'both'of said arms maybe depressed in accordance. with the work to be performed, and when in their operative positions, they form a bro-ad bearing and support for the steam shovel as'a whole, and not only prevent'the side rockmoving 'onit's wheels.

The operation of the jack as awhole is under the immediate control, of the engineer:

What is cla med is:

A jack for power-operated shovels, comprisinglinco'mbination with a shovel truck frame, oppositely arranged brackets, a truck suspension frame embodying sidebars which extend under saidbracketsand are fastened o "the truckf-rame, said sidebars forming bracket supporting stirrups and extending upwardlyover and across the truck frame, supporting arms pivotally connected to-said brackets and extending in opposite direc-' tions therefrom, jack screws .journaled on said brackets, runners threaded on said ing thereof but alsoprevent the truck from 

